Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3895caa00739b0703e5beb2f26bdb643d483d42e5f07e12dbf45b54ef3fd89e2' 
  AND token = 'zXgpMFnAU2rz5d1s2T3sTQsC0wq5LT+dOxADIx4k95g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}